Pentair/Sta-Rite Maxetherm Heater Tube Sheet 333,000 BTU (P/N: 474060) SHIPS IN 6 TO 8 WEEKS
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Fits the Sta-Rite Maxetherm heater 333k btu model
Also known as 77707-0233
Located in the combustion chamber.
Water flows through the heat exchanger tubes which extract heat from the flue gases.
If your heater is leaking out of the blower or venting or out of the top of the combustion chamber you could have a hole in the copper tube sheet.